Rivet-slotting machine



A. R. HAVENER RIVET SLOTTING MACHINE June 15 1926.

Filed Nov. 12. 1925 5 sheetssneet 1 I7 buen/7501.

June l5 1926. .1,588,576

A. R; HAVENER RIVET SLOTTING MACHINE Filed Nov. 12, 1923 5 Sheets-Sheet2 5 L Www@ 1,588,576 A. R. HAVENER RIVET sLoTTING MACHINE June 15, 1926.

Filed Nov. l2, 1923 5 Sheets-Sheet 3 IHA/ambo?.

fly-' agar vJune 15 1926. f

' A. R.HAVENER RIVET sLoTTING MACHINE Filed Nov. 12, 1925 5 Sheets-Sheet4 5 Sheets-Sheet 5 Filed NOV. 12, 1923 0 kfw w .Figi/6;

Patented June 15, V1926.

y UNITED STArss ARTHUR R. HAVENER, GF WAYLAND, MASSAHSETTS, .ASSIGNOR T0JUDSON Il. THOMSON MANUFACTURING CO., OF WALTHAM, MASSAUHUSETTS, ACORPORA- TION 0F MASSACHUSETTS.

RIVET-SLOTTING IACHINE.

Application filed November 12, 1923. Serial No. $214,171.

This invention relates to a machinefor slotting the Shanks of rivets.

rlhe object ofthe invention is to provide a machine which wiil performthe worl; very rapidly as compared with machines which have heretoforebeen employed for this purose. This result isA attained by feeding aplurality of rivets to a rotary cutter during one rotation of thecutter, the rivets being held firmly in position during the slottingoperation and ejecting mechanism being provided which operates aplurality of times to eject a plurality of rivets from the ma.- chineduring one rotation of the cutter shaft.

The preferred embodiment of my invention hereinafter described i andclaimed, utilizes a plurality .of cutter blades vfast to a rotary memberanda rivet fed -intoposition andy held in position for each of thecutter blades respectively, which are fastened tos-aid cutter member. InView of the speed with which the rivets must be fed to the cutterblades, it is necessary,A to feed the rivets successively to a carrierby positively actuated vmechanism instead of depending upon `gravity toperform this function.

In tlie embodiment of my invention here- ,1 inafter disclosed, twocutter .blades are emi, n time will be twice `that of the machine ein--ployed, and assuming that the cutter shaft lrotates at the same speed asin machines of this class heretofore employed, the number of rivetsslotted by the machine in a given ploying a sing'le cutter blade andonly feeding one rivet to the cutter blade for one rotation of thecutter shaft.

The invention consists in the combination ,and arrangement of parts setforth in the the :left of Figure 1. 1

Fig. l is a detail front elevation of the mechanism for actuating therivet driver andholder. Y y y Fig. 5 is a detail front elevation of themechanismY which actuates therivet carrier.

Fig. 6 is avfront elevation ofthe rivet ejecjting mechanism. y l

l1"ig. 7 is a front eleif'ation, breiten away, and illustrating thecutter blades and the rotary member to which they are fastened.v

Fig. 8 is a sectional elevation taken on line .F ig. 9 is a detailsectional elevation taken on line 9 9, Fig. 1.

Fig. 10r is a detail elevation viewed in the direction of the arrow a,Figure 1, and illustrating the mechanism for feeding the rivets from theraceway tothe carrier.

Fig. 11 is a detail elevation similar to 10,showing the parts in.different relative positions.

Fig. 12 is a side'elevation of a slotted rivet.

llig. 13 is an enlarged front elevation partly in section, illustratingthe driver in its lowermost position and a rivet ready tc kbe fed intothe rivet carrier and another rivet held. in, position for slotting,with portion of the position.

Fig. lllis an elevation viewed in the direction'of the arrowd, Fig. 13,the work support and ejector' plate being shown in section. y Y

y Fig. 15 is a plan view viewed in the direction of the arrowv c', Fig.13, illustrating the ejector plate and a portion of thework support.Fig; 16 is a detail cross section ,taken on line lf3-1G, Figure 15.

cutter shown in operative ln practical operation the machine ispositioned with the median longitudinal line of the driver at an angleof about 60 toa horizont'al plane, as illustrated in Fig. 13.

Like numerals refer vto like vparts throughout theseveral views ofthedrawings.

lnthedrawings, '15 is the frame ofl the machine, '16 is the cutter shaftwhich is rotated by a pulley, or other suitable means, not shown in thedrawings. Av gear 17 is fastened to the cutter shaft 16 and meshes intoanother gear 18 fast to a cam shaft .19. The

a nut andcollar '25, see Figs.` 7 andl 8.

l gear y17 havingA twice the pitch Vdiameter of the gearjlS, so thatonero-v 'lhe cutter blades 20 and2l The cutting edges 20iand 21 of thecutter blades 2O and 21 respectively are eccentric to the axial line ofthe cutter shaft 16, and

in the operation of the machine the-cutter asa whole, consisting of thediscs 22 and 23 and the cutter blades 20 and 21, rotates in thedirection of the arrow b, Figf7.

The rivets 26, to be slotted, are fed from a hopper, in a manner wellknown to those skilled in this art, down a raceway 27 and are fed fromthe bottom of vthe raceway, one by one, to an auxiliary raceway 28 by aslide 29, there being a slot 8O in said slide to receive the rivet whenit is being transferred from the raceway 27 to the'raceway 28.

This construction is old in the art and is fully described in UnitedStates Letters Patent Nos. 879,895 and 879,896 to J. E. Perrault,patented February 25, 1908, Machine for etting rivets, to whichreference may be had in this connection. Y

The rivets 26 slide one at a time down the raceway 28 until thelowermost rivet 26 engages a driver and holder 31, as illustrated inFigs. 13 and 14.

A reciprocatory motion is imparted to the slide 29 by Vlever 32 pivot-edat 33 to the frame of the machine and having a rocking' .motion impartedthereto by a spring arm 34,

the free end of which projects through a hole 35 in the arm 36 of saidlever 32. VThe spring arm 34 is fastened to a. split block 37 which isclamped by a screw 38 to a rod 39 see Fig. 2. A reciprocatory motion isimr parted to the rod 39 by a cam 40, Figs. 2

and 4 fast to the cam shaft 19 and by a spring` 41, one yend of which isfastened to a pin 42, and the other end to an ear 43 on the hub 44 of anarm 45. The slide 29 slides in ways provided upon the frame of themachine and has rigidly fastened to the front end thereof an arm 46, tothe lower end of which is fastened a feed finger 47, see Figs. 10 and 1113 and V14. The feed finger 47 is positioned to pass above the shank ofthe vrivet 26 on the raceway 28 when the slide 29 ismoved toward theright, from the position illustrated in Fig. 10 to the position.illustrated in Fig. 11, and by this movement the linger 47 willpositively force the rivet 26 on'the raceway 28 against the driver 31and infso doing` the feed linger 47, which is of thin -flat material andresilient, will be broughtinto tension, so that when the driver 31 movedupwardly, untilthe lower end thereof is above thehead of the rivet 26,the rivet 26 will be immediately forced into a rivet carrier 48, whichconsists of two side plates 49, each of which is fastened to a fiatVspring and said'fl'at springs are fastened, by means of a bolt 51 and anut 52 to a carrier slide 53, see Figs. 3 and 5.

A reciprocatory motion is imparted to the lslide 58 by a'cam 54 which isengaged by a cam roll 55 journalled upon an arm 56, see

Figs. 2 and 5, the arm 56 being fast to'a rock shaft 57 journalled uponarbearing 58 on the frame of the machine. The opposite end of the shaft57 has another arm 59 fast thereto, to the upper end of which isfastened a pin 60 which projects through a slot 61 in one end of a link62, the other end of` said link being pivotally connected at 63 tocarrier-slide 53. A spring 71 is connected Y Aat one end to the pin 60and at the other end to the pin 63 and normally holds lthe pin 60 inengagement with the left Ahand end of the slot 61, see Fig. 5, while theroll 55 on the arm 56 is held in. engagement with the cam 54 by a spring72. This mechanism provides yielding means between the cam'54 and thecarrier 48, in the event of any ,obstruction to the normal operation ofthe device occurring. 1

A reciprocatory motion is imparted to the rivet driver and holder 31,Figs. 1 and 4, by a slide73 arranged `to slide in ways provided in theframe of the machine and driven by a linl 74 and arm 75 which isVfastened to a rock shaft 76 journalled in bearings 77 and 78 in theframe -of the machine. Y

A rockingmotion is imparted to the rock shaft 76 by an arm 79 which isconnected by the pin 42 to the rod 39, to which a reciprocatory motionis imparted by the camv 40,

are hereinbefore set forth.

The rivet 26, see Fig. 9, is driven by thedriver and holder 31 out ofthe rivet carrier Y48 and into a hole 80 in the work support 81. Thework support 81 is fast to the frame of the machine and has a ridge 82extending upwardly therefrom and longitudinally thereof, upon which thehead of the rivetl V26 rests, and upon which it is firmly held by therivet driver and holder 31. V

lVhen the parts are in the positions illustrated in Fig. 9, the rivet isin readinessY The ejector plate 84 is fastened to an armV 86, which isfastened to a rock shaft 87 journalled to rock in a bearing 88 in theframe of the machine and having fastened to its rear end the arm 45, towhich motion is imlil) parted by a cam` 88 fast to the cam shaft 19 andengaging a cam roll 89 rotatably mounted upon a pin 90 on the lower endof the arm 45.

The Vgeneral operation of the mechanism hereinbefore specificallydescribed is as follows zi Rivets to be slotted are fed from a hopper,not shown in the drawing, but in a manner well known to those skilled inthe art, downy the raceway 27 and are transferred one by one from thebottom of said raceway by the slide 29 to the auxiliary raceway 28. Thelowermost rivet 26 in said auxiliary raceway is transferred to thecarrier 48 by the feed linger 47, actuated by the arm 46, and slide 29in a manner hereinbefore described. Said rivet 26 having beentransferred to thek carrier 48 is carried downwardly by said 'carriertoward the work support 81 and is then driven by the driver and holder31 downwardly out of the carrier 48 and into the hole 80 in the worksupport 81, with its head resting upon the ridge 82 forming a part ofsaid work support. lVhen in this position, the bifurcated portion A85 ofthe ejector plate 84-projects beneath the head of the rivet 26 and therivet is held firmly in position by 'the rivet driver and holder 31 andby the slide 73, link 74 and arm 75, it being noted `that when in this4position the link 74 and arm 7 5, which together form a toggle, arepositioned on dead centers. 1

It is very desirable that the driver and holder 31 when feeding therivet downwardly'` out of the rivet carrier 48 should be actuated by ayielding or spring pressure, but that it should' be held rigidly inposition againstl the head of the rivet 26 when the slotting operationis taking place and this is accomplished by the mechanism illustratedparticularly in Figs. 2 and 4 wherein it will be noted, as hereinbeforespecifically set forth, that the spring 41 acts to rock the arms 75 and79 downwardly and the cam 40 acts to rock said arms upwardly so that theslide 73 and driver 31 through the link 74 are moved downwardly with ayielding pressure by means of the spring 41, but the arm 75 and link 74when in their downward position, as shown in Fig. 4, constitute a togglewith the pivots on dead centers so that the driver and holder 3l when inthat; position is positively locked against any upward pressure and therivet 26 is locked in position while being slotted by the rotary cutter.The driver and holder 31, slide 73,

vlink 74 and the arms 75 and 79 on their upward movement are positivelyactuated by the cam 40. The object of this construction is to avoiddamage to the different vparts hereinbefore referred to, that is, to thedifferent parts which actuate the driver 80 and holder 31 so that incase a rivet is not in the cutter blades 2O or 21 and after the slottingj f operation has been performed the rivet` driver and holder movesupwardly and the ejector plate 84 is actuated to eject the rivet fromthe machine and into the tray y83.

Another rivet is now fed and held in position to be slotted, ashereinbefore described, and will be slotted by the other of the twocutter blades 2O or 21 and ejected from the machine, after beingslot-ted by the ejector plate v84.

I claim:

l. A `rivet slotting machine having, combination, a rotary cutter,mechanism' to feed a plurality of rivets to said cutter during-a singlerotation thereof and means to hold said rivets in-position l'while thecutter during a single rotationsuccessively com" pietes the slotting ofthe shanks thereof.

2. A rivet slotting machine having, in combination, a rotary cutter,mechanism to positively feed a plurality of rivets to said cutter duringsingle rotation thereof and Vmeans to hold said rivets in position whilethe cutter during a single rotationfsuccessrvely completes `the slottingof the shanks thereof.

A 'rivet vslo-tting machine having, in

-combinatioin-a rotary cutter, mechanism to feed a rivet to each of saidcutter blades respectively during a single rotation of said rotarymember, and means tohold said rivets in position while saidcutter'blades, during a single rotation of said rotary member,

successively complete the slotting of the shanks thereof.

5. A rivet slotting machine having, in combination, a'rotary cuttershaft, a cutter fast thereto, a cam shaft and cams, mechanism to rot-atesaid cam shaft and cams Y gle rotation of said' cutter shaft, mechanismactuated by said cams to teed a rivet to each of said cutter bladesrespectively during a single rotation of said cutter shaft and means izoactuated by one of said cams to hold said rivets in positionsuccessively While said cutter blades are slotting the shanlrsthereof.

7. A rivet slotting machine having, in combination, a rotary cutter, arivet carrier, a raceway, mechanism to positively feed rivets from saitracevvay on tosaid carrier, a Work support, a driver, and mechanism tomove said driver to feed a plurality of rivets successively from saidcarrier on to said Work support during a single rotation of said .cutterand to successively hold saidy rivets in position Aon saidrivork supportWhile said cutter, during a single rotation thereof, is successivelyslotting the shanlrso't` a plurality of said rivets.Y

S. A rivet slotting machine having, in combination, a rotary cutter, arivet carrier, a raceway, mechanism to feed rivets troni said raceway onto said carrier, a Work support, a driver, mechanism to move said driverto successively feed a plurality or rivets from said carrier on to saidWork snpport and hold Vsaid rivets in position While said cutter,'duringa single rotation thereof, is slotting the shanls ot said rivets, anejecting lever positioned beneath the head of each rivet during theslotting operation and mechanism to move said ejectin'g lever aplurality of times during one rotation oit said cutter to eject aplurality of rivets from said machine aiter the slottingfoperation hasbeen Ypertormed.

i). A. rivet slotting machine having, l in.V

combination, a rotary cutter, a rivet carrier, a raceivay, mechanism toVfeed a plurality of rivets successively from said raceWay on to saidcarrier during a single rotation. of said cnttena Work support, adriver, a slide to Whichsaid driver is faste-ned, mechanism embodyingatoggle joint to impart a plurality olE reciprocatory motions to saidslide and driverduring a single rotation ot' said `cutter and reetsaidrivets successively from said carrier on to said Work support andrigidly hold them successively in position While said cutter, during a'single :rotation thereof, is successively Vslottinn' the Shanks of saidrivets, and means to eject successively a plurality ot rivets during onerotation of said cutter. Y c Y l0. fr rivet slotting machine having, in

combination, a rotary cutter, a rivet carrier,

a raceivay, mechanism to positively feed a rivet Jfrom'said raceway ontosaid carrier, a ".verlr support, a driver and mechanism to move saidvth'iver to yieldingly feed a rivet `fromV said carrier onto said Worksupport and positively hold said rivet in position thereon While saidcutter is slotti'ng the shank thereof, said rivet-feeding mechanism anddriver-actuating mechanism being operable to successively feedandposition two rivets to be slotted by said cutter during one rotationthereof. Y f

'ln' testimony whereof have hereunto set my hand, f

ARTHUR n. nAvENER.

